- Why was the man arrested?
- Sabotage. He blew up a train.

3 seconds sound clip from the Stalag 17 movie soundboard.

You can hear this line at 01:14:09.855 in the Blu-ray version of the movie.

Quote context

[...]

- What have you got to say?

- I like it here.

- What about you?

- It's all right, considering.

- What happened to you? Were you beaten? Why don't you answer? What did you do to this man?

- They didn't do nothing.

- Who beat you?

- Nobody beat me. We were playing pinochle. It's a rough game.

- Pardon me, sir. Since you want us to speak up, there was a man removed from this barracks last night. A Lieutenant Dunbar. We'd appreciate your looking into it. That's if they haven't shot him yet.

- Why was the man arrested?

- Sabotage. He blew up a train.

- They'd have to prove that first, wouldn't they? Isn't that what the Geneva Convention says? You can't just take a man and shoot him.

- I didn't do it. I didn't do it. I didn't do it.

- Of course you did.

- Twenty-six carloads of munitions gone off like a trick cigar.

- The S.S. Is running around in circles. The Gestapo is arresting the wrong people. And von Scherbach has caught the fish.

[...]